Gas-burner and automatic cut-off therefor.



l. E. JARGSTORFF. GAS BURNER AND AuTomAnc' CUT-OFF THEREFOR.

APPLICATION FILED JULY 27, 1914.

Patented May 18, 1915;

a Z 4 M Z Z x 5 Z M M 2 I7 0 6% 2 Z 3 a H 2 w n L fi mm Fw m. 3 6

O x m} W. Z J 5 5 W. o/m E 4 a E 3 3 1 R N E 5 1 4/ w. a F 6 4/ w Rlm u m J M M R a 0 WJ m F W J l w 4 v. 7 MB /m J L h THE NORRIS PETERS C0,, PHOTO-LITHOH wASHlNGmN. D. C.

U1 s a Es JULIUS n. JARGSTORFF, or New YORK, N. Y.

GAS-BURNER AND AUTOMATIC CUT-OFF THEREFOR. I

Specification of Letters Patent.

' Patented May s, 1915.

Application filed July 27, 1914. Serial No. 853,413.

matic Out-Off Therefor, of which the following is a full, clear, and exact description.

This invention relates to an'improved gas burner and automatic cut-offtherefor designed to automatically cut off the flow of gas whenever the flame from any cause becomes extinguished other than by means ofthe usual cut-off or gas cook controlling the supply to the burner.

The primary object of the invention is to provide a simple, novel and positively operable cutofl which will prevent asphyxiation or other serious complications or occurrences due to the escape of gas into a room or building resulting from a failure or stoppage in the supply of gas from the main at a time when the burners are lighted, from blowing out the gas or by accidental failureto prop erly cut oil the supply of gas to the burners in such a manner as to permit the gas to escape therefrom.

With the above and other objects in view,

the invention resides in the peculiar combinat1on and arrangement of parts to be here-,

inafter more fully described, illustrated and claimed, it being also an object to provide a device which is simple in construction,

' durable and eflicient in operation and not likely to get out of order.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate correspondlng parts in all the views, and in which 7 Figure 1 is a vertical sectional view of my improved gas burner and automatic cut-ofl applied to a burner pipe, the parts being shown in the positions they assume when the burner islighted; Fig. 2 is a similar view but showing the positions ofthe parts when the burner is extinguished; Fig. 3 is a horizontal sectional view taken on the line of Fig; 2; Fig. 4 is a detail perspective view of parts of the thermos valve actuating device for controlling the supply of gas to the burner.

" In recapitulation, it is submittedthat the idea of the deviceis toprevent the escapeof gas in the event that the light is blown out or the :supply of the main is cut out without closlng the. usual gas cook or cut-ofl,

thus preventing asphyxiation 'or the escapeof gas COIltlIlllOllSlY thereafter, and for this purpose a gas pipe 10 isillustrated carrying the usual gas cook or cut-01f 11: for con-. trolling the gas supply to the burner in the usual manner. The burner is inthe form of a sheet or rolled metal casing' l2 enlarged at-its upper end and having a reduced depending portio'n'or neckl3'fitting the burner pipe and removably supported thereon as" through the instrumentality of a flange or; shoulder 14. A plate 15 is crimped or other-- wise secured to the'top of the casing 12, as shown at 16, and in such a manner as to form an airtight 1 union preventing the escape of gas from between the joint, it being understood that the gas supplythrough EN F the pipe 10 when the cut-off 11 is open will entirely fill the interior'of the casing. The plate'15 formingthe top of the casing is provided with an'opening 17 to one side of the center from which projects an inwardly extending sleeve/18 produced by stamping out a portion of the plate and drawing the same inwardly from the metal which is so stamped or punched in so as to adapt the sleeve to receive a burner tip 19 of any well known or improved design. Asmaller tube 20 is also drawn from the top portion of the casing by punching the same in and 1 drawing out the tube to the requiredthickness and length or attaching the same'there to, the tube 20 being located diametrically opposite to the tube- 18 and'being ofsmjaller diameter and depending the same distance" into the casing. 1'

Mounted in the casing-'Jfo'r'vertical move-: ment is a valve disk 21 formedwwith'or carrying'a vertical -extension22 which is prefe erably of frusto-conic'al' outline 'and-i'so p0 sitioned as to enterthe bottom of the tube 18 and to hold the disk 'v'alve from rotation-.:

by contact with the. inner" surface ofsaid:

tubeand guide'the disk in 'its'verticalinove ments. The valve loosely fits inlthetcasing to permit the gas to e'scape 'therearound into: thetube18 and through th'e burnentip to be lighted for throwing on light or'heat' as occasion requires. Mounted upon "the disk is a gasket or valve packing 23-whichmay be of rubber orany otherfima'terial which will produce: an- -airtight1':joint by contact:

withthe ilower end of'thetuberlSundruthi action of an expansible coiled spring 24 mounted beneath the disk and engaging the bottom of the enlargement of the casing around the reduced portion or neck 13, but which is not materially aifected, deteriorated or decomposed by the gas.

' Disposed to operate in the tube 20 is a pin 25 which has a reduced portion 26 at its lower end forming a downwardly facing shoulder 27 to limit the downward displacement of the pin by contact with the upper face of the plate 15 forming the top of the casing and also to prevent the escape of gas from between the tube 20 and the pin. It is also understood that the lower ends of the tubes are normally closed by the gasket. on the disk or valve 21 under the action of the spring 24, as is clearly shown in Fig. 2 of the drawings, when the gas escaping from the: burner tip isnot ignited.

Removably attached for vertical adjustment at one side of the enlarged portion 12 of the casing of the burner is an angular bracket 28 having, a slotted lower end, as shown at 29, also bent at an angle, the slot being open at its lower end to permit the bracket to be freely attached and adjusted with respect to the casing through the instrumentality of a set screw 30 threaded in the casing atone side of the latter corresponding to the disposition of the tube 20 and in alinement with both of the tubes. The bracket thus extends upwardly and outwardly and is provided with a horizontal overhanging bar 31 which carries a thermocontrolled device consisting of an expansible element or strip 32 which is held in position between two stamped-out or offset tongues 33 bent downwardly from the overhanging portions 31 and extending toward each other in, opposite directions. The bracket is made of material which is not readily sensitive to heat or which has a low coefficient of expansion, while the element or strip 32 is adapted to readily expand under heat or has a high coeflicient of expansion", and being held between thetongues its expansion is restritced generally to the central part between the tongues In the operation of the device, when the gas is turned off and the element or strip 32 is cool, theva-lveunder the action of the spring 24 willbe' held: upwardly to close the lower ends ofthe tubes 18 and 20, although the pin-25 1s made to fit the tube 20 s'ufiiciently tight to prevent the escape of gas between the twor. As the extension 22' simply acts as a guide to insurepositive seating of the valve and to prevent movement thereof, the escape: of gaswill be prevented, and as the pin 25- is disposed between the valve and the expansible element or strip 22, the: pin will. be held upwardly displaced and in contact: with said stripi. By holding: a torch or lighted match to the expansible element or strip the latter will be caused to expand and bulge downwardly, as shown in Fig. 1 of the drawings, so as to depress the valve and open the same against the action of the spring 24 by exerting downward pressure thereon through the instrumentality of the pin 25, and in this manner permit the escape of gas around the extension 22 and through the tube 18 to the burner to be ignited. If, however, the gas should be extinguished without turning off the supply, the strip will cool and move to the position shown in Fig. 2 so as to permit the valve to again close under the actionof the spring and prevent further escape of the gas and consequently obviate all danger or accidents which might otherwise occur.

The expansible element or strip 32 is secured or anchored at its ends to the tongues 33, as by means of rivets 34:, the purpose of this being to prevent expansion of the strip at its ends, as well as to prevent displacement thereof.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. A gas burner and automatic cutoff therefor, comprising a casing adapted for application to a burner pipe, a pair of independent tubes depending from the edge of the casing and into the same at equi-distances, a burner tip in one of the tubes, a pin in the other tube, a horizontally disposed expansible element adjustably supported above the pin and having a restricted expansible area, means in the casing acting against the pin to raise the same as far as the lower end of its containing tube and simultaneously closing the lower ends of the tube at spaced points, said expansible element upon being heated being adapted to expand to move said tube closing means through the instrumentality of the pin to unseat the same and permit the escape of gas through the tube for ignition and means to hold the closing means for the lower ends of the tube against rotation.

2. The combination with a supply pipe having a cut-01f and a shell having a reduced portion fitted to the pipe, said shell having a top portion with a pair of openings therethrough; of a burner fitted in one opening, an expansible element supported by the casing above the other opening for movement downward when expanded, a spring-pressed valve in the casing'for nor mally closing the openings, and vertically operable means between the expansible element and the valve for depressing and opening the latter upon heat being applied to said element to expand the same, whereby gas will escape to the burner to be lighted.

3. A burner and automatic cut-off for gas as described, comprising a sheet metal casing having a central neck portion depending therefrom, a plate clamped to the top of the casing and having a pair of depending tubes drawn therefrom to either side of its center, a tip in one of said tubes, a pin in the other of said tubes and having a reduced portion forming a shoulder limiting its downward displacement, a valve disk loosely mounted in the casing and having an extension adapted to extend into the first-mentioned tube, a packing gasket on the disk to form an air-tight union with the tubes, a spring inthe casing beneath the disk to hold the latter upwardly displaced as specified, an angular bracket secured for vertical adjustment to one side of the casing and having a part overhanging the pin, said overhanging part having Copies of this patent may be obtained for five cents eaeh, by addressing the Commissioner of Patents,

stamped-out tongues, and an expansible element between the tongues whereby when said element is heated it will expand between the tongues to engage the pin and unseat the tract when the gas is extinguished, whereby the spring will act against the pin to again cut off the supply of gas to the tip.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JULIUS E. J ARGSTORFF.

Witnesses:

KAREL L. WoLKE, Jr., PHILIP D. RoLLHAUs.

Washington, D. G. 

